Abstract: A friction clutch includes an iron inner clutch plate and two iron outer clutch plates. Each clutch plate has a sliding surface that friction-engages with the other clutch plates. A diamond-like carbon film containing silicon, which functions as a solid lubricant, is formed on the sliding surface of each outer clutch plate through a conventional method such as plasma chemical vapor deposition. The diamond-like carbon film contains 1 wt % to 80 wt % of silicon. A coupling device includes a pilot clutch mechanism that has the friction clutch and an electromagnetic actuator. As a result, the friction clutch has an improved resistance to wear, and the coupling device is durable.

Abstract: It is one object of the present invention to provide a program writing method of numerical controller, a numerical controller and a cutting machine controlled thereby, achieving the writing of a plurality of programs relating to one axis to perform a high efficiency in a lot of productions. A next or later user-set-program controlling a duplicated axis controlled by plural user set programs identifies a virtual axis virtually controlled by one user set program. A program is written to replace the duplicated axis with the virtual axis. A control amount calculated by the user set program identifying the virtual axis is added to a control amount inputted to a correspondent axis driving program as a control amount of the duplicated axis before replacing the virtual axis.

Abstract: An electromagnetic valve includes a valve body, a valve element, a movable iron core, a guide tube, a coil, a yoke, and a fixed iron core. The valve body includes a fluid flow path. The valve element is movable and seated on a valve seat provided in the fluid flow path of the valve body. The movable iron core moves the valve element with respect to the valve seat. The guide tube is cylindrical and movably supports the movable iron core. The coil is mounted on an outer periphery of the guide tube. The yoke covers an outside of the coil and forms a magnetic circuit. The fixed iron core is provided facing the movable iron core and attracts the movable iron core by energization of the coil. The valve body is coupled to the guide tube on one opening end side of the guide tube, and the fixed iron core is provided on an other end side of the guide tube with a clearance spaced from an inside of the guide tube.

Abstract: A plurality of segmented chips are reinforced by applying an adhesive to the circumferentially opposite end portions thereof, and the adjoining segmented chips adjoining in the circumferential direction are adhered to the circumferential surface of a disc-like core with the adhesives at the circumferentially opposite end portions being not jointed with each other. Thus, the segmented chips can be prevented from being loaded with an unnatural force even when the disc-like core with the segmented chips adhered thereto expands and contracts radially due to thermal expansion and thermal contract. Thereby, expansion and contraction of the disc-like core do not impose a compression stress or the like on adhesives situated between adjoining segmented chips.

Abstract: In a motor controller, if a failed electric current flow in any one of phases of a motor is detected, a motor control signal is generated, based on a phase other than the phase with the failed electric current flow, in such a manner that a motor electric current matches a required torque except for at a specific rotation angle corresponding to the phase with the failed electric current flow.

Abstract: In a spindle apparatus for a machine tool, a spindle is supported on a housing by support-purpose bearing devices, and is rotated by an electric motor, and a tool is attached to a tool attaching portion formed at a distal end of the spindle. A radial magnetic bearing for vibration suppressing purposes which includes a plurality of electromagnets is provided around the tool attaching portion of the spindle. A plurality of radial displacement sensors for detecting a displacement of the tool attaching portion in radial directions are provided around the tool attaching portion. There is provided an electromagnet control unit for controlling the electromagnets of the radial magnetic bearing on the basis of outputs of the radial displacement sensors so as to support the tool attaching portion in a predetermined position.

Abstract: In a bearing device, a double row rolling bearing for supporting a pinion gear-side portion of a pinion shaft on a case (annular wall) is formed by a tandem-type double row angular contact ball bearing. A first row of balls having a larger pitch circle diameter are disposed between inner and outer rings of the double row angular contact ball bearing at a region near to the pinion gear, and a second row of balls having a smaller pitch circle diameter are disposed between the inner and outer rings at a region remote from the pinion gear. A bearing internal space is divided into a first bearing internal space containing the first ball row and open toward the pinion gear and a second bearing internal space containing the second ball row and sealed by partition walls formed respectively by bearing seals, lubricating grease being sealed in the second bearing internal space.

Abstract: A microcomputer (an electric current command value calculating section) carries out field weakening control in which a d-axis electric current command value Id* is set to a negative value in correspondence with rotation angular velocity ? of a motor. The microcomputer determines whether an anomaly has occurred in an EPS. If it is determined that an anomaly is in a power supply system (step 202: YES), the microcomputer determines whether the anomaly in the power supply system is failure of electric current flow in any phase (step 203). If it is determined that electric current flow has failed in a certain phase, the microcomputer prohibits the field weakening control and outputs a motor control signal instructing to use two other phases free from the failure of electric current flow as electric current flowing phases (two phase drive mode, step 204).

Abstract: A magnetized pulsar ring of the invention is a pulsar ring fixed to an outer peripheral surface of a supporting member and including a ring body in which a number of magnetic poles are at predetermined intervals in a peripheral direction. The ring body 11a is formed of a plastic magnet, and has a cushion member made of an elastic body that is interposed between the ring body and the outer peripheral surface.

Abstract: In a rolling bearing cage, adjacent cage bar portions on both sides of each pocket have protrusions protruding toward the pocket and a radially outer side and retaining a rolling element, accommodated in the pocket, from the radially outer side, a side surface of each cage bar portion and the corresponding protrusion, facing the pocket, has a guide surface slidably guiding the rolling element, the guide surface includes a first circular arc surface having a concave shape corresponding to an outer peripheral surface of each rolling element, and a side surface of each protrusion, facing the pocket, has a second circular arc surface having a convex shape smoothly continuous with a radially outer side of the first circular arc surface and an introducing surface smoothly continuous with a radially outer side of the second circular arc surface and inclined to a side opposite to the pocket toward a distal end of the protrusion.

Abstract: A vehicle steering apparatus includes a steering member for rotational operation, and a support mechanism that supports the steering member so as to be movable between a housing position where the steering member is housed in a fixed frame of an instrument panel and a projection position where the steering member projects to an outside of the fixed frame. The steering member includes a main body supported by the support mechanism, a pair of grip sections which are movable between the housing position and the projection position together with the main body, and which are supported so as to be movable between a nonoperating position and an operating position by the main body, and a grip section drive actuator which is supported by the main body, and drives the pair of grip sections to the nonoperating position and the operating position.

Abstract: A power transmission chain includes a plurality of links, a plurality of pins, and a plurality of interpieces. By pressing upper and lower edges of the pin into upper and lower edges of a through hole, the pin is connected to the link. The end of the pin which is located at a front end side when the pin is pressed is formed in a shape into which the upper and lower edges of the pin are pressed at the same time.

Abstract: There are provided a coloration agent for use in ceramic articles which offers an effective reuse of shot waste and which contributes to the reduction of manufacture costs, as well as a color developing clay using the same. The coloration agent contains metal powder separated from the shot waste and uses metal oxide powder contained in the metal powder as a basic raw material. The color developing clay is prepared by admixing the coloration agent with a clay raw material.

Abstract: A machining apparatus, in which a plurality of user set programs in relation to one axis is written and the amount of the infeed motion of the grinding wheel is increased to restrain the change of the load of the grinding wheel, improves a machining accuracy and achieve a longer life of the grinding wheel.

Abstract: A sliding-type tripod-shaped constant-velocity universal joint capable of being downsized while reducing induced thrust force. The constant-velocity universal joint includes: an outer race; a tripod including a boss portion and three tripod-shaft portions being inserted into roller grooves; and rollers. And, a shaft-axis-wise width of the tripod-shaft portions is formed smaller as it goes from the root side to the leading-end side in a torque transmission region of the tripod-shaft portions. Further, a torque-transmission-wise width of the tripod-shaft portions is formed greater as it goes from the root side to the leading-end side in the torque transmission region when defining a direction that intersects with the shaft axis and the tripod-shaft portions orthogonally as a torque transmission direction.

Abstract: An amorphous carbon film forming apparatus according to the present invention is characterized by being provided with a film forming furnace 11; plural workpiece fixtures 23 for supporting plural plate-like workpieces 22 in a state that the same are piled up vertically in parallel with the interval between facing surfaces of two vertically adjoining of the plate-like workpieces 22 being in a range of 2 to 30 millimeters, the plural workpiece fixtures 23 being arranged within the film forming furnace 11 at a regular angular interval on a circle and being connected to a negative electrode; nozzles 31, 32 provided for supplying a processing gas and including at least one nozzle arranged at a center of the circle on which the plural workpiece fixtures 23 are arranged and plural nozzles arranged at a regular angular interval on another circle which surrounds the workpieces fixtures 23 radially outside thereof; and a plasma power supply connected to at least the workpiece fixtures 23.

Abstract: There provided a lubricant composition that without any excess increase of the steering torque of an electric power steering apparatus and without any generation of sliding noise, reduces rattling sound thereby excel in the effect of noise reduction in automobile compartment, and is capable of favorably sustaining the above effect even when continuously used in high-temperature environment for a prolonged period of time; a speed reduction gear using the lubricant composition; and an electric power steering apparatus. The lubricant composition includes buffer particles of a polyurethane resin synthesized by reacting a polycarbonate polyol, cross-linking agent having three or more active hydrogen groups per molecule and a polyisocyanate. The speed reduction gear (50) is filled with the lubricant composition. The electric power steering apparatus incorporates the speed reduction gear therein.

Abstract: In a vehicle differential unit according to an embodiment of the invention, a planetary carrier that is a rotatable member that rotatably supports planetary gears is formed of cylindrical members that are unable to rotate relative to each other on the rotational axis of a pair of output shafts. The vehicle differential unit has a thrust force generation portion that receives a driving force from a drive source of a vehicle and generates a thrust force along the direction of the rotational axis of the pair of output shafts, and a relative movement limiting portion that limits a relative movement between the cylindrical members along the axial direction due to the thrust force when the vehicle is in the drive mode.

Abstract: A rolling bearing assembly for a wheel includes a cylindrical fixed bearing ring fixed to a vehicle body side, a rotary bearing ring rotatably inserted to inside of the fixed bearing ring, and plural rows of rolling elements rollably arranged between the bearing rings. An annular sensor housing is attached to an inboard side end portion of the fixed bearing ring and includes a plurality of displacement sensors for detecting gaps between the displacement sensors and outer peripheral surfaces of inboard side end portions of the rotary bearing ring in a circumferential direction. Further, an inboard side end portion of the sensor housing is sealed by an inner side seal device.

Abstract: A bush bearing includes a synthetic resin-made bush having a circumferential groove on its outer peripheral surface; an endless annular elastic member fitted in the circumferential groove of the bush; and a positioning structure for determining the position of the bush in a B direction with respect to an inner peripheral surface of a gear housing.